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Small Unmanned Aerial Systems (sUAS) show promise in being able to collect high resolution spatiotemporal data over small extents. Use of such remote sensing platforms also show promise for quantifying uncertainty in more ubiquitous Earth Observation System (EOS) data, such as evapotranspiration and consumptive use of water in agricultural systems. This study compares measurements of evapotranspiration (ET) from a commercial vineyard in California using data collected from sUAS and EOS sources for 10 events over a growing season using multiple ET estimation methods. Results indicate that sUAS ET estimates that include non-canopy pixels are generally lower on average than EOS methods by >0.5 mm day−1. sUAS ET estimates that mask out non-canopy pixels are generally higher than EOS methods by −1. Masked sUAS ET estimates are less variable than unmasked sUAS and EOS ET estimates. This study indicates that limited deployment of sUAS can provide important estimates of uncertainty in EOS ET estimations for larger areas and to also improve irrigation management at a local scale.
Michael Kalua; Anna Rallings; Lorenzo Booth; Josué Medellín-Azuara; Stefano Carpin; Joshua Viers. sUAS Remote Sensing of Vineyard Evapotranspiration Quantifies Spatiotemporal Uncertainty in Satellite-Borne ET Estimates. Remote Sensing 2020, 12, 3251 .
AMA StyleMichael Kalua, Anna Rallings, Lorenzo Booth, Josué Medellín-Azuara, Stefano Carpin, Joshua Viers. sUAS Remote Sensing of Vineyard Evapotranspiration Quantifies Spatiotemporal Uncertainty in Satellite-Borne ET Estimates. Remote Sensing. 2020; 12 (19):3251.
Chicago/Turabian StyleMichael Kalua; Anna Rallings; Lorenzo Booth; Josué Medellín-Azuara; Stefano Carpin; Joshua Viers. 2020. "sUAS Remote Sensing of Vineyard Evapotranspiration Quantifies Spatiotemporal Uncertainty in Satellite-Borne ET Estimates." Remote Sensing 12, no. 19: 3251.
Hedgerows and riparian buffers in agricultural landscapes can help increase landscape multifunctionality and thereby mitigate conflicts among agricultural production and environmental stewardship objectives. However, the relative merits of conserving versus increasing non-production perennial vegetation (NPPV) are not well understood despite the universal conflicts among such objectives in rapidly urbanizing and intensifying agricultural regions worldwide. Hence, using the most intensive agricultural region of British Columbia, Canada as a case study, we aimed to (i) evaluate the current status of NPPV in terms of carbon stocks and landscape connectivity metrics (ii) compare options for conservation relative to agricultural expansion in terms of maintenance of landscape multifunctionality (iii) identify management options for NPPV that could maximize ecological benefits using a normative scenario analysis. We determined that 83% of the NPPV found on the farmland in our study area is likely susceptible to conversion to expanding agricultural production or urban development. Scenario analysis showed planting hedgerows along all farm parcel boundaries and riparian buffers along all farmscape waterways will not compensate for the loss of multifunctionality from agricultural intensification based on expansion. Conserving or planting hedgerows alone however resulted in a disproportionate increase in connectivity given the relative loss of productive agricultural land. This analysis clearly highlights the potential trade-offs among the indicators evaluated as well as the benefits of intensification on land already in production. In the assessed landscape, protecting existing large patches of NPPV and augmenting the landscape pattern with hedgerows is an effective approach to conflicting objectives and ensuring landscape multifunctionality.
Anna M. Rallings; Sean M. Smukler; Sarah E. Gergel; Kent Mullinix. Towards multifunctional land use in an agricultural landscape: A trade-off and synergy analysis in the Lower Fraser Valley, Canada. Landscape and Urban Planning 2019, 184, 88 -100.
AMA StyleAnna M. Rallings, Sean M. Smukler, Sarah E. Gergel, Kent Mullinix. Towards multifunctional land use in an agricultural landscape: A trade-off and synergy analysis in the Lower Fraser Valley, Canada. Landscape and Urban Planning. 2019; 184 ():88-100.
Chicago/Turabian StyleAnna M. Rallings; Sean M. Smukler; Sarah E. Gergel; Kent Mullinix. 2019. "Towards multifunctional land use in an agricultural landscape: A trade-off and synergy analysis in the Lower Fraser Valley, Canada." Landscape and Urban Planning 184, no. : 88-100.